Reply to Live Music

I am really interested in getting into live music and am looking for a pretty much all in one controller. I know that is noobish but space is important to me because i live in a tiny ass dorm. I know that i would like to use ableton triggers using mainly samples i get from traktor. I would like to know what I am getting myself into. Should i start with a launchpad or akai 40? And do those come with full editions of ableton live? Any input will be appreciated. Thanks.